198044939 has 2 divisors, whose sum is σ = 198044940. Its totient is φ = 198044938.

The previous prime is 198044929. The next prime is 198044947. The reversal of 198044939 is 939440891.

It is a strong prime.

It is an emirp because it is prime and its reverse (939440891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198044939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198044893 and 198044902.

It is not a weakly prime, because it can be changed into another prime (198044929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99022469 + 99022470.

It is an arithmetic number, because the mean of its divisors is an integer number (99022470).

Almost surely, 2^198044939 is an apocalyptic number.

198044939 is a deficient number, since it is larger than the sum of its proper divisors (1).

198044939 is an equidigital number, since it uses as much as digits as its factorization.

198044939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 198044939 is about 14072.8440267062. The cubic root of 198044939 is about 582.8917602612.

The spelling of 198044939 in words is "one hundred ninety-eight million, forty-four thousand, nine hundred thirty-nine".